Description
PROCESS DESCRIPTION Filtration
The raw well water available at the suction of raw water pump in RO hall, shall be introduced into sand filter through raw water pump. The sand filter shall remove the suspended solids up to 20 microns, present in well water. Sand filter is back washed once a day and at first startup of the day to refresh, the media removing retained suspended particles.
The filtered water then shall pass through Activated Carbon filter for the removal of organics & free chlorine if any. Activated carbon also improves odor & removes color of water adsorbing contamination on its surface. The activated carbon is again refreshed through backwash of the filter as stated above for sand filter.
Reverse Osmosis System
Reverse osmosis (RO) membranes are used to reduce the dissolved solids present in the feed water. The product received from RO is called permeate. The concentrate or reject generated from RO system shall be high in TDS and shall be drained locally.
Cleaning in Place (CIP)
The RO membranes are periodically cleaned to remove sparingly soluble salts on the surface of membranes using the process called CIP. The skid mounted tank shall be supplied for preparation of chemical solution for cleaning of RO membranes. The piping arrangement shall be made in a way that the raw water pump & cartridge filter at RO inlet shall be used in CIP circuit.
System Operation
The RO system shall be fully automatic with levels of the raw water & product water tanks as well as low & high pressure tripping provided across high pressure RO feed pump.
TECHNICAL SPECIFICATIONS & SCOPE OF SUPPLY
The technical specifications of major equipment & materials in scope of supply being listed below;
Raw Water Pump
The client shall supply raw water from overhead tank up to the suction of raw water pump at battery limit.
Quantity : 01 Nos.
Capacity : 20 m3/h
Discharge pressure : 10.0 bar
Type : vertical/horizontal, centrifugal
Make : CNP / Equivalent
High Pressure RO Feed Pump
The high pressure RO feed pump used for pressurized supply of raw water into membranes for desired recovery of permeate water.
Quantity : 01 Nos.
Material : SS316
Capacity : 20 m3/h
Discharge pressure : 8~10 bar
Type : vertical, centrifugal
Make : CNP / Equivalent
Recovery : 80~90%
Raw Water Temperature : 25 ~ 35 o C
Raw Water type : filtered, well water
RO Configuration : 5×5
Permeate TDS : <10 p.p.m
Reverse Osmosis Membranes
The Reverse Osmosis membranes are top quality hydronautices or Pall Brackish Water membranes. Thin film composite TFC, FDA approved, manufactured by Dow Chemicals or HYDRONAUTICE with 99.5 percent salt rejection.
Quantity : 17Pcs.
Model : 4080
Membrane Surface Area : 8”X40”
Type of Membranes : Spiral wound
Material of membrane : TFC, PA
Membrane Housings : FRP
Heavy-duty Reverse Osmosis pressure vessels/housings are made of SS/FRP material, tested, and certified by “American Society of Mechanical Engineers” ASME.
Quantity (Triple Membrane Housing) : 15Nos
Quantity (Single Membrane Housing) :02
Model : 8080
Pressure rating : 350 psi
Elements per Vessel : 03Nos.
Material of vessel : FRP
Reverse Osmosis Skid/Frame : SS/MS
The entire RO frame made of mild SS/MS, which provides a durable corrosion resistant surface easy to clean & maintain.
Pressure Gauges
Stainless steel liquid filled low and high pressure gauges with following specifications.
Quantity : 3Pcs
Dial Size : 2.5”
Material of gauges : SS316
Connection type : bottom or back
Online Flow meter
Online flow meters for setting up recovery of the RO system installed on permeate & concentrate line.
Quantity : 02 Nos.
Type : Rota meters
Mounting type : panel mounted
Configuration : Round/Flat
Online TDS Monitor
This instrument is online conductivity instrument, which monitors conductivity of permeate of RO.
Quantity : 01 Nos.
Location : permeate line
Range : 0~1000 µs/cm or 0~2000 µs/cm
Make : Create
RO Configuration : 5×5
Permeate TDS : <10 ppm
